[Bug target/85829] [8/9 Regression] PARTIAL_REG_DEPENDENCY and MOVX were disabled for Haswell and newer processors

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85829

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jan Hubicka from comment #3)
> 
> So I would suggest to revisit PARTIAL_REG_DEPENDENCY wrt PARTIAL_REG_STALL
> for Haswell+

We should do that for GCC 9.  For GCC 8, we should restore what we had
before.